@charset "utf-8";
html {
  min-height: 100%;
}
* {
  margin: 0;
  padding: 0;
}
body {
  font: 10px/1.6 "微软雅黑", arial, Simsun, Arial Unicode MS, Mingliu, Arial, "Lucida Grande", Helvetica, sans-serif;
}
a {
  color: #00B7FF;
}
#content {
  width: 80%;
  margin: 2em auto;
}
p {
  font-size: 1.6em;
  text-align: left;
}
.clear:after {
  content: ' ';
  clear: both;
  visibility: hidden;
  height: 0;
  display: block;
}

.ad {
  width: 100%;
  height: 5em;
  background-color: yellow;
}